Which of the following is true about virtual functions in C++?
|A.||Virtual functions are functions that can be overridden in derived class with the same signature.|
|B.||Virtual functions enable run-time polymorphism in a inheritance hierarchy.|
|C.||If a function is ‘virtual’ in the base class, the most-derived class implementation of the function is called according to the actual type of the object referred to, regardless of the declared type of the pointer or reference. In non-virtual functions, the functions are called according to the type of reference or pointer.|
|D.||All of the above|
|Answer» D. All of the above|
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